The gas cloud imager (GCI) is a passive uncooled multispectral camera capable of unprecedented sensitivity for
analyzing hydrocarbon gas mixtures in a scene. The GCI is currently finishing its final stages of development,
and promises to obtain a 220×220 image of gas concentrations at 30 frames/sec, allowing for real-time display in
a compact instrument without moving parts. We summarize measurement approach and discuss the advantages
of the GCI instrument design against conventional instruments.